Today we had a record Photovoltaic harvest for this time of year, 24.20 kWh, even though it is still 7 weeks before the Summer Solstice. This is explained by the ultra clear sky, but also by the very nippy North East wind that helped keep the panels cool all morning. There were two days with scores of over 24 kWh in a day during May 2010, so this is a good start. But really.... I wish for a day of heavy rain to water the garden and all the other gardens!
However, all is not perfect, each of Feb, Mar and Apr 2011 have gathered lower PV figures than the same months of last year, and maybe I should get 'Brian' in to clean them with his long brush! (or do it myself.). With only about 10 mins of rain in the whole of April, surely it should have been a higher PV harvest?
On the metering front, things are still going well. The house meter is about to dip below 5,400 kWh for a whole year, and the Heat Pump is about to go below 3,400 kWh. (This heat pump figure includes the Heating, Hot water and Underfloor circulating pump). The Surya Sunboxes have had a good week despite the dormancy of the heat pump, and they have scored 3,030 kWh for the last year.
TV Aerial shadow: One annoyance is bothering me which is that the summer afternoons have a distinct 300W dip in the Bell Curve while the shadow persists - this can be seen above from 3pm till 4.30pm when the Sun is finally around to the West. Any shading on the entire array will cause a loss.
This doesn't need shifting sideways. I think the vertical tube is held in a clamp, and can be moved downwards.